| 严寒地区地埋管换热器周围土壤冻结区域分布特征实验研究 |
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| 引用本文： | 张之强,金光,吴晅,田瑞,郭少朋. 严寒地区地埋管换热器周围土壤冻结区域分布特征实验研究[J]. 土木建筑与环境工程, 2017, 39(6): 143-148. DOI: 10.11835/j.issn.1674-4764.2017.06.020 |
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| 作者姓名： | 张之强 金光 吴晅 田瑞 郭少朋 |
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| 作者单位： | 1. 内蒙古科技大学能源与环境学院,内蒙古包头014010;内蒙古科技大学内蒙古自治区白云鄂博矿多金属资源综合利用重点实验室,内蒙古包头014010;2. 内蒙古科技大学能源与环境学院,内蒙古包头,014010;3. 内蒙古工业大学风能太阳能利用技术省部共建教育部重点实验室,呼和浩特,010051 |
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| 基金项目： | 内蒙古自治区自然科学基金（2014MS0530、2015MS0561） |
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| 摘 要： | 建立了模拟严寒地区土壤热失衡状态下地源热泵冬季运行情况的实验装置,实验研究了地埋管周围土壤冻结区域的分布特征,给出了冻结相变锋面的平均移动速度。结果表明,土壤冻结区域呈不对称性分布,流体进口温度为-15℃时,埋深为350、700、1 050mm,热响应区在40~60mm段,冻结锋面的平均移动速率分别为5、5、6.67mm/h,热响应区在60~80mm段,冻结锋面的平均移动速率分别为1.54、1.82、1.82mm/h;土壤冻结在一定程度上有利于地埋管与周围土壤之间的换热,在严寒地区地源热泵的设计中应考虑土壤冻结现象。
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| 关 键 词： | 严寒地区 地源热泵 土壤冻结 冻结锋面 冻结相变 |
| 收稿时间： | 2017-03-15 |
Experimental analysis of the distribution characteristics of the frozen soil area around ground heat exchanger in cold region |
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| Zhang Zhiqiang,Jin Guang,Wu Xuan,Tian Rui and Guo Shaopeng. Experimental analysis of the distribution characteristics of the frozen soil area around ground heat exchanger in cold region[J]. Journal of Civil,Architectrual & Environment Engineering, 2017, 39(6): 143-148. DOI: 10.11835/j.issn.1674-4764.2017.06.020 |
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| Authors: | Zhang Zhiqiang Jin Guang Wu Xuan Tian Rui Guo Shaopeng |
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| Affiliation: | School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, P. R. China;Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources, IMUST, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, P. R. China,School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, P. R. China,School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, P. R. China;Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources, IMUST, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, P. R. China,Key Laboratory of Wind Energy and Solar Energy Utilization Technology, Ministry of Education, Inner Mongolia University of Technology, Hohhot 010051, P. R. China and School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, P. R. China |
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| Abstract: | An experimental device is established in this paper,the operating condition of ground source heat pump under the condition of soil thermal imbalance in cold region in winter is simulated.The experiment studies the distribution characteristics of the frozen soil area around the buried pipe,and gets the average moving speed of freezing front.The results show that the distribution of frozen soil area is asymmetric.When the fluid inlet temperature is-15 ℃ and buried depth is 350,700 and 1 050 mm,the average moving speed of freezing front is 5,5 and 6.67 mm/h in the heat response areas of 40～60 mm,and the average moving speed of freezing front is 1.54,1.82 and 1.82 mm/h in the heat response areas of 60～80 mm.The frozen soil to a certain extent in favor of heat transfer between buried pipe and surrounding soil,so the frozen soilshould be considered in the design of GSHP in cold area. |
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| Keywords: | cold region ground source heat pump soil freezing freezing phase transition freezing front |
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